denied). The case caused disagreement in the courts as Wedderburn insisted that slavery and perpetual servitude were different states. He argued that in Scots law Knight, even though he was not recognised as a slave, was still bound to provide perpetual service in the same manner as an indentured servant or an apprenticed artisan. The Justices of the Peace in Perth, at first instance, found in favour of Wedderburn. However, when Knight then appealed to the Sheriff Deputy the first instance decision was then overturned. Wedderburn then made a further appeal to the Lords of Council and Session. The Court of Session emphatically rejected Wedderburn's appeal, ruling that "the dominion assumed over this Negro, under the law of Jamaica, being unjust, could not be supported in this country to any extent: That, therefore, the defender had no right to the Negro’s service for any space of time, nor to send him out of the country against his consent: That the Negro was likewise protected under the act 1701, c.6. from being sent out of the country against his consent." Evidence presented by both sides in the case survives in the National Archives of Scotland (reference CS235/K/2/2). Henry Dundas, then Lord Advocate, acted for Knight. Zong massacre In late November or early December 1781 the captain and crew of the English slave ship, Zong, threw various African slaves into the sea off the island of Hispaniola, to save the lives of the remaining slaves as provisions were short. The shipowners then sought to claim under policies of insurance, arguing that jettisoning the cargo constituted a recoverable loss, even though it necessarily resulted in the murder of the slaves. In the first round of legal proceedings a jury initially held for the shipowners and upheld the claim. On a subsequent application to set that judgment aside, Lord Mansfield indicated that the jury in the initial trial "had no doubt (though it shocks one very much) that the Case of Slaves was the same as if Horses had been thrown over board". That finding was overturned and fresh trial ordered, but in both legal actions it was accepted in principle by the court that the killing of the negro slaves was permissible, and did not thereby invalidate the insurance by virtue of being an unlawful act. Shortly afterwards provisions in the Slave Trade Act 1788 made it unlawful to insure against similar losses